Match the following columns and select the correct option:
$(a)$ $6-15$ pairs of gill slits $(i)$ $Trygon$
$(b)$ Heterocercal caudal fin $(ii)$ $Petromyzon$
$(c)$ Air bladder $(iii)$ $Chondrichthyes$
$(d)$ Poison sting $(iv)$ $Osteichthyes$

$(a)\quad (b)\quad (c)\quad (d)$

  • A
    $(ii)\quad (iii)\quad (iv)\quad (i)$
  • B
    $(iii)\quad (iv)\quad (i)\quad (ii)$
  • C
    $(iv)\quad (ii)\quad (iii)\quad (i)$
  • D
    $(i)\quad (iv)\quad (iii)\quad (ii)$

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Select the correct option for the following matches:
$(1)$ Diploblastic$(a)$ Protozoa to Echinodermata
$(2)$ Coelomate$(b)$ Platyhelminthes to Chordata
$(3)$ Triploblastic$(c)$ Coelenterata
$(4)$ Invertebrates$(d)$ Annelida to Chordata

Comb jellies are ..................... and jelly fishes are .................. respectively.

Which of the following is common between Annelida and Arthropoda?

Which of the following snakes is not poisonous?

Match the columns and choose the correct combination.
$A$. Polychaeta$p$. Scorpion
$B$. Trematoda$q$. Pila
$C$. Arachnida$r$. Liver Fluke
$D$. Gastropoda$s$. Nereis
$t$. Star Fish

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